Expert help please. I examined a S&W model 1917 commercial model today SN 179570 (parallel to grips, with lanyard present), small S&W logo on left side plate; cylinder, butt, and barrel SN matching, 55198 on crane and frame with an eagle head military acceptance proof next to the number on the frame. Original blue was 95% with checkered wooden grips of the correct post war type. Any insight appreciated; seller wanted 1200 beans and I am thinking of getting it.